2 research outputs found
Robust, Superamphiphobic Fabric with Multiple Self-Healing Ability against Both Physical and Chemical Damages
Superamphiphobic coatings with excellent
repellency to low surface
tension liquids and multiple self-healing abilities are very useful
for practical applications, but remain challenging to realize. Previous
papers on self-healing superamphiphobic coatings have demonstrated
limited liquid repellency with single self-healing ability against
either physical or chemical damage. Herein, we describe a superamphiphobic
fabric that has remarkable multi-self-healing ability against both
physical and chemical damages. The superamphiphobicity was prepared
by a two-step surface coating technique. Fabric after coating treatment
showed exceptional liquid-repellency to low surface tension liquids
including ethanol. The fabric coating was also durable to withstand
200 cycles of laundries and 5000 cycles of Martindale abrasion without
apparently changing the superamphiphobicity. This highly robust, superamphiphobic
fabric may find applications for the development of “smart”
functional textiles for various applications
DataSheet1_An electronically conductive 3D architecture with controlled porosity for LiFePO4 cathodes.docx
Thick LiFePO4 (LFP) cathodes offer a promising solution to increasing the areal capacity and reducing the cost of Li-ion batteries while retaining the qualities intrinsic to LFP, including long cycle lifetimes and thermal stability required for electric vehicles and stationary energy storage applications. However, the primary challenges of thick LFP cathodes are poor rate capability and cycling stability due to LFP’s electronically insulating material property, poor electronic conductivity, and long diffusion length at high electrode thicknesses. Herein, we propose an electrode architecture composed of vertically aligned carbon fibers (CFs) attached to a plasticized current collector (PCC) to promote rate capability, cycle life, and further enhance the safety of thick LFP cathodes. The effectiveness of the CF-PCC architecture is demonstrated by electrochemical analysis with a good areal capacity of 3.5 mA cm-2, excellent cycling stability at C/3, and good rate capability up to 1C. These results are confirmed by investigating the architecture’s impact on ionic diffusivity via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) compared to the conventional slurry cast LFP cathode.</p